Another update -- Cradle with Transformer with the regulator heatsink.

This is only mock up for taking an early picture, as the sink has to be cut into 2 pieces with a 20mm gap in between, so that air can flow over a smaller length of the sink (factor of 8 less flow resistance).

All discussion between team, me and forum are finished and I am supposed to announce details. But we have a big customer meeting at work these 3 days, so I won't have time till Friday earliest. So my apologies for that. The case GB is not as simple as the resistor GB and needs some explaining.

For those who are taking Option 2 of the case, and/or are 1:1 according to the prototype, these are the following PCBs you would need for 2 channels of F5X Dual Mono (separate transformers, one case) :

2x PSU PCB set, each including one regulator PCB and 4 capacitor PCBs, 70um single sided, probably available as GB with fitzfish, as these are of no general use without the case and hence probably limited in demand (max 50).

1x Control & Protection board, front panel mounted, 35um doubled sided, available from MarkLai as GB, as these are of no general use without the case and hence probably limited in demand (max 25).

There is an additional PCB already done by ashaw which has the same circuit as my control & protection board, but are laid out for general use. If there is sufficient demand, we shall make the Gerber files available to the forum so that they can make that available to you all (schematics will be published in due course).

The main amplifier PCB (and the PSU PCB) has been checked by me. Fitzfish is making the final corrections. The Gerber files will then be sent to Variac, and 10 prototype will be make to check for layout errors. Of the 10, 4 will go to AR2, 4 to fitzfish, and 2 to smyslow. They will have to burden to test the PCB for layout errors first, then go through the different circuit configurations, test, measure and report.

When the main Amp PCB has been tested OK and the forum ready to put them up at the shop, we shall publish the schematics, component placement diagrams, and the bill of material.

I shall gauge interest for the other PCBs later when the case subscribers have all confirmed their orders.